[FieldTrip] Error while using ft_sensorrealign

[f.chella at unich.it]

Hi Eelke,
thanks for pointing out this oversight, but it seems not to depend on that.

Now, I specified both as column cell array (3x1).
However, the error is still occurring.

Federico



Def. Quota Eelke Spaak <eelke.spaak at donders.ru.nl>:

> Hi Federico,
>
> No idea whether this matters (haven't tested it), but perhaps the error is
> due to sens.fid.label being a column cell array (3x1) and cfg.target.label
> being a row (1x3)?
>
> Best,
> Eelke
> Op 7 jul. 2014 11:38 schreef <f.chella at unich.it>:
>
>> Hi everyone,
>>
>> I am getting an error when I use ft_sensorrealign to align my MEG sensor
>> (i.e., ITAB MEG sensor) with the subject mri using fiducials.
>>
>> Below is the code I am using.
>> I first specified the fiducial location in the sensor space in the field
>> sens.fid:
>>  sens.fid.pnt(1,:) = [0   101.5    0] ;
>>  sens.fid.pnt(2,:) = [-69.9    -0.6    0.8];
>>  sens.fid.pnt(3,:) = [69.9     0.6   -0.8];
>>  sens.fid.label{1} = 'nasion';
>>  sens.fid.label{2} = 'left';
>>  sens.fid.label{3} = 'right';
>>
>> and then I called ft_sensorrealign:
>>  cfg = [];
>>  cfg.method   = 'fiducial';
>>  cfg.fiducial = {'nasion', 'left', 'right'};
>>  cfg.target.pnt(1,:) = [-0.5    86.5   -15.5];
>>  cfg.target.pnt(2,:) = [-73.5   -7.5  -43.5];
>>  cfg.target.pnt(3,:) = [69.5  -16.5  -44.5];
>>  cfg.target.label    = {'nasion', 'left', 'right'};
>>  sens_realigned = ft_sensorrealign(cfg,sens);
>>
>> Now, I get the following error:
>>
>>  ??? Subscripted assignment between dissimilar structures.
>>  Error in ==> ft_sensorrealign at 235
>>      tmp(i) = ft_convert_units(template(i), elec.unit); % ensure that the
>> units are consistent with the electrodes
>>
>> Does anyone know why this would be occurring and how to fix it?
>> Thanks in advance for the help.
>>
>>
>> Federico Chella, Ph.D.
>> Dept. of Neuroscience, Imaging and Clinical Sciences
>> ITAB ? Institute for advanced Biomedical Technologies
>>  ?G. d'Annunzio? University of Chieti-Pescara, Chieti, Italy
>>
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>